Changing Majors All Episodes Episode 43 Ways to put out the fire from firefighter [Fire and Safe Management at Kyungmin Univ] ( Air Date 2023-12-07 ) Genre Talk, Reality category. Overview "Lee Chang Sub (of BTOB) reviews various university departments, experiencing a day in the life of a student in that major. He is Jeongwaja, the man who changes his major everyday. A 2022 campus cultural revitalization project aimed at sharing information, capturing memories and promoting various departments.".